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Agam answered 1 year(s) , 8 month(s) ago

Edit the following passage

WRONG                          CORRECT

Have                                   Has
Were                                  is
since                        ...

Sep 19

• 71 Likes
• 230226 Views

Sep 19

Priyanshu answered 9 month(s) , 2 day(s) ago

Speech of 1 minute on "hobbies and interest". very urgent

Note: This question is to be answered on the basis of your own understanding, experience and thoughts. It is strongly recommended that you prepare the solution on your own. However, one sample soluti

...

Sep 28

• 50 Likes
• 203684 Views

Sep 28

Priyanshu answered 1 year(s) , 5 month(s) ago

The ratio of the sum of n terms of two A.P.s is (7n+1):(4n+27).

Answer. Given ratio of sum of n terms of two AP’s = (7n+1):(4n+27)
Let’s consider the ratio these two AP’s mth terms as am : a’m →(2)
Recall the nth term of AP formula, an = a + (n – 1)d...

Nov 13

• 37 Likes
• 183946 Views

Nov 13

Syeda answered 1 year(s) , 10 month(s) ago

Show that one and only one out of n,n+2,n+4 is divisible by 3, where n is any positive integer.

We applied Euclid Division algorithm on n and 3.
a = bq +r  on putting a = n and b = 3
n = 3q +r  , 0 i.e n = 3q   -------- (1),n = 3q +1 --------- (2), n = 3...

Apr 15

• 28 Likes
• 150065 Views

Apr 15

Priyanshu answered 1 year(s) , 5 month(s) ago

What are the values of log from 1 to 10?

log 1 = 0
log 2 = 0.3010
log 3 = 0.4771
log 4 = 0.6020
log 5 = 0.6989
log 6 = 0.7781
log 7 = 0.8450
log 8 = 0.9030
log 9 = 0.9542
log 10 =...

Jan 18

• 12 Likes
• 123056 Views

Jan 18

Priyanshu answered 1 year(s) , 8 month(s) ago

what is the derivation of mirror formula of concave and convex mirror?

Consider the shown figure where O is a point object and I is corresponding image.
CB is normal to the mirror at B.
By laws of reflection,

For small aperture...

Nov 16

• 29 Likes
• 108893 Views

Nov 16

Syeda answered 1 year(s) , 9 month(s) ago

Find the value of tan 15 degrees

Let  tan(15°) = tan(45°-30°)

We know that tan(A - B) = (tanA - tanB) /(1 + tan A tan B)

⇒tan(45°-30°) = (tan45°- tan30°)/(1+tan45°tan30°)

= {1-

...

Apr 20

• 10 Likes
• 105644 Views

Apr 20

Syeda answered 1 year(s) , 10 month(s) ago

An electric bulb is rated 220V and 100W. when it is operated on 110V, what will be the power consumed?

P = V 2/R
If V = 220 V we have

100 W = 220 2/R
R = 220 2/100 Ω = 484 Ω. This is the resistance of the bulb.

When V = 110 V,...

Jun 24

• 6 Likes
• 102371 Views

Jun 24

Syeda answered 1 year(s) , 10 month(s) ago

A plane left 30 min later than the scheduled time and in order to reach the destination 1500km away in time it has to increase the speed by 250km/h from the usual speed. find its usual speed

Sol:
Let the usual time taken by the aeroplane = x km/hr
Distance to the destination = 1500 km
Case (i)
Speed = Distance / Time = (1500 / x) Hrs

Case (iI)...

Asked by P duraisami

Apr 28

• 6 Likes
• 98837 Views

Asked by P duraisami

Apr 28

Syeda answered 1 year(s) , 10 month(s) ago

If mth term of an A.P is 1/n and the nth term is 1/m

• SME Approved

Nov 24

• 9 Likes
• 93792 Views

Nov 24

Yogita answered 1 year(s) , 1 month(s) ago

Prove that 9AD2 = 7AB2

In this solution triangle ABC and ACE is taken in place of ABC, ABE should be taken.

Sep 1

• 13 Likes
• 93398 Views

Sep 1

Syeda answered 1 year(s) , 10 month(s) ago

Find the greatest 6 digits number exactly divisible by 24, 15,and 36.

We will find out the LCM of 24,15 and 36 is 360.

Now, greatest 6-digit number is 999999.

Now, We will divide this number by LCM of 24,15 and 36, we will get,

999999/360 will get remai

...

Apr 20

• 7 Likes
• 92210 Views

Apr 20

Syeda answered 1 year(s) , 10 month(s) ago

If the polynomial X4- 6X3+16X2-25X+10 is divided by X2-2X+k

Given that the remainder is (x + a)
⇒ (4k – 25 + 16 – 2k)x + [10 – k(8 – k) ] = x + a
⇒ (2k – 9)x + [10 – 8k + k 2 ] = x + a
On comparing both the sides, we get...

Aug 20

• 8 Likes
• 92064 Views

Aug 20

Priyanshu answered 1 year(s) , 5 month(s) ago

Explain the mechanism of opening and closing of stomata.

Sol:
Stomata are small pores present in the epidermal cells of leaves in plants. Stomata are open during the day and close during night.Stomata take in carbon dioxide required for the photosynthetic act...

Mar 22

• 6 Likes
• 91318 Views

Mar 22

Anand answered 1 year(s) , 2 month(s) ago

What is the difference between a virtual image and a real image?

The following are the main differences between a real image and virtual image.

1.A real image can be caught on a screen whereas a virtual image cannot be caught on a screen.
2. A real i...

Dec 3

• 23 Likes
• 82922 Views

Dec 3

Agam answered 1 year(s) , 8 month(s) ago

What is nutrition? Explain different types of nutrition.

Nutrition is the process by which an organism procures its nourishment, the supply of nutrients required by its body and cells to stay alive. Nutrition is of two types namely, autotrophi...

Feb 18

• 7 Likes
• 82495 Views

Feb 18

Syeda answered 1 year(s) , 10 month(s) ago

Key Features of Federalism

There are two or more levels  of government.

1.  Different tiers of government govern the same citizens, but each tier has its own jurisdiction in specific matters of legislation,

...

Aug 19

• 5 Likes
• 80546 Views

Aug 19

Syeda answered 1 year(s) , 10 month(s) ago

Find the largest number which divide 615 and 963 leaving remainder 6 in each case.

To find the largest number which divides 615 and 963 leaving remainder 6 in each case i.e. HCF.

Consider HCF be x.

In order to make 615 and 963 completely divisible by x, we need to deduct th

...

May 22

• 6 Likes
• 79190 Views

May 22

Syeda answered 1 year(s) , 10 month(s) ago

To find 4th vertex of a parallelogram

Given three of vertices of a parallelogram are A(1,2), B (4,3), C (6,6).

Let the coordinates of fourth vertex be D (x, y)

In a parallelogram, diagonals bisect each other.

He

...

Feb 11

• 4 Likes
• 76533 Views

Feb 11

Syeda answered 1 year(s) , 10 month(s) ago

In an ap of 50 terms, the sum of 1st 10 terms is 210 and the sum of its last 15 terms is 2565. find the a.p.

Consider a and d as the first term and the common difference of an A.P. respectively.

n th term of an A.P., an = a + ( n – 1)d

Sum of n terms of an A.P., S n = n/

...

Feb 27

• 5 Likes
• 75973 Views

Feb 27

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